Park Hae Woong

Bio: Park Hae Woong is an academic researcher. The author has contributed to research in topics: Olefin fiber & Polyolefin. The author has an hindex of 2, co-authored 14 publications receiving 17 citations.

Polypropylene-based composite

Abstract: The present invention provides a polypropylene-based composite capable of exhibiting impact strength characteristics, particularly, significantly improved impact strength characteristics at low temperatures, together with excellent strength characteristics, even without using a separate additive, by comprising (A) polypropylene and (B) an olefin-based polymer satisfying the following requirements, (b1) to (b4): (b1) density (d): 0.850 g/cc to 0.910 g/cc; (b2) melting index (MI, 190°C, 2.16 kg load conditions): 0.1 g/10 min to 100 g/10 min; (b3) molecular weight distribution (MWD): 1.5 to 3.0; and (b4) i) having two peaks in a temperature range of -20°C to 120°C for the measurement of temperature rising elution fractionation and ii) T(90)-T(50)‰¥60°C (where, T(90) is the temperature at which 90 wt% of olefin-based polymer is eluted and T(50) is the temperature at which 50 wt% of olefin-based polymer is eluted).

Polyolefin having excellent properties

Abstract: The present invention relates to a polyolefin having molecular weight distribution of 1.5 to 3.0, and a branch gradient number (BGN) value of -0.01 to -1. The polyolefin according to the present invention has a molecular weight distribution of 1.5 to 3.0, and a branch gradient number (BGN) value of -0.01 to -1, wherein the branch gradient number value is calculated by Equation 1, which is BGN = (content of high molecular weight side chain - content of low molecular weight side chain) / (content of low molecular weight side chain). According to the present invention, a polyolefin having excellent impact strength and mechanical physical properties can be provided.

Polyolefin-based resin composition and elastomer comprising the same

Abstract: The present invention relates to a polyolefin-based resin composition and a polyolefin-based elastomer containing the same The polyolefin-based resin composition has low viscosity at a high shear rate, thereby enabling production of a polyolefin-based elastomer exhibiting excellent processability To this end, the density of the polyolefin-based resin composition is 0850-0910 g/cc

Olefin based copolymer having controlled crstalline porpoerty and molecular weight distribution

Abstract: The present invention relates to an olefin-based copolymer which has novel crystalline properties, and enables production of molded articles with enhanced impact strength and mechanical properties in compounding with other resins. The olefin-based copolymer includes an ethylene repeating unit and an alpha-olefin-based repeating unit. When analyzed by a temperature rising elution fractionation method, the olefin-based copolymer shows a first fraction and a second sub-crystalline fraction at a predetermined temperature respectively. When each weight average molecular weight of the first fraction and the second sub-crystalline fraction are calculated, a certain ratio is satisfied.

Polypropylene-based composite material

Abstract: The present invention provides a polypropylene-based composite material capable of exhibiting excellent strength properties and impact strength properties, particularly, markedly improved impact strength properties at a low temperature without using a separate additive by including (A) polypropylene, and (B) an olefin-based polymer which satisfies the conditions of the following (b1) to (b4): (b1) density (d): from 0.850 to 0.910 g/cc, (b2) melt index (MI, 190° C., 2.16 kg load conditions): from 0.1 g/10 min to 100 g/10 min, (b3) molecular weight distribution (MWD): from 1.5 to 3.0, and (b4) i) two peaks are shown in a temperature range of −20° C. to 120° C. when taking measurements of temperature rising elution fractionation, and ii) a relation of T(90)−T(50)≥60° C. is satisfied (where T(90) is a temperature at which 90 wt % of the olefin-based polymer is eluted, and T(50) is a temperature at which 50 wt % of the olefin-based polymer is eluted).

Olefin-based copolymer and process for preparing same

Abstract: The present invention relates to an olefin-based copolymer having novel crystalline properties and capable of providing a molded article with further improved strength and impact strength when compounded with other resins, and a method for preparing the same The olefin-based copolymer is an olefin-based copolymer comprising an ethylene repeating unit and an α-olefinic repeating unit The olefin-based copolymer comprises polymer fractions defined by three different peaks at a predetermined temperature when analyzed by cross-fractionation chromatography

Olefin based copolymer and preparation method for the same

Abstract: The present invention relates to a copolymer satisfying the following conditions: (1) density (d) is 0.85-0.89 g/cc; (2) melt index (MI, 190°C, 2.16 kg load condition) is 15-100 g/10min; (3) the number of unsaturated functional groups (total V) per 1,000 carbon atoms is 0.8 or less; and (4) the total Vs of vinylene and vinyl per 1,000 carbon atoms as measured by nuclear magnetic spectrum analysis satisfies (a) vinylene/total V=0.1-0.7 and (b) vinylene/vinyl=0.8-1.6. According to the present invention, the olefin-based copolymer, as the contents and types of unsaturated functional groups therein are adjusted, exhibits high fluidity while showing improved properties in terms of hardness, flexural strength, tensile strength, and the like.

Olefin based copolymer having controlled crstalline porpoerty and molecular weight distribution

Abstract: The present invention relates to an olefin-based copolymer which has novel crystalline properties, and enables production of molded articles with enhanced impact strength and mechanical properties in compounding with other resins. The olefin-based copolymer includes an ethylene repeating unit and an alpha-olefin-based repeating unit. When analyzed by a temperature rising elution fractionation method, the olefin-based copolymer shows a first fraction and a second sub-crystalline fraction at a predetermined temperature respectively. When each weight average molecular weight of the first fraction and the second sub-crystalline fraction are calculated, a certain ratio is satisfied.

Polypropylene-based composite material

Abstract: The present invention provides a polypropylene-based composite material capable of exhibiting excellent strength properties and impact strength properties, particularly, markedly improved impact strength properties at a low temperature without using a separate additive by including (A) polypropylene, and (B) an olefin-based polymer which satisfies the conditions of the following (b1) to (b4): (b1) density (d): from 0.850 to 0.910 g/cc, (b2) melt index (MI, 190° C., 2.16 kg load conditions): from 0.1 g/10 min to 100 g/10 min, (b3) molecular weight distribution (MWD): from 1.5 to 3.0, and (b4) i) two peaks are shown in a temperature range of −20° C. to 120° C. when taking measurements of temperature rising elution fractionation, and ii) a relation of T(90)−T(50)≥60° C. is satisfied (where T(90) is a temperature at which 90 wt % of the olefin-based polymer is eluted, and T(50) is a temperature at which 50 wt % of the olefin-based polymer is eluted).

Method for predicting physical properties of polymer

Abstract: The present invention relates to a method for predicting the physical properties of polymers. More specifically, the present invention relates to a method for predicting long-term stability of polymers using a molecular weight distribution curve.